I want to do -Back to the future- like flame stripes
Final:



Emitter:

For Emitter/Flow I've used two Planes with some Loop Cuts sized differently to have random fire width. Important thing is here real world scale. Both of them are 10m long and ~15cm width. Scale applied (!).

I've assigned Transparent material to them so they are not visible in render.



Domain:

Domain has pretty high Resolution along with Smoke High Resolution. Settings like below.

Material is simple, without smoke.



Wind:

Last part is Force Field > Wind with some Noise.




  If you need any specific explanation, please ask in comments.